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test_uart.py
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test_uart.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
'''Ripyl protocol decode library
uart.py test suite
'''
# Copyright © 2013 Kevin Thibedeau
# This file is part of Ripyl.
# Ripyl is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
# Ripyl is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with Ripyl. If not, see <http://www.gnu.org/licenses/>.
from __future__ import print_function, division
import unittest
import random
from collections import deque
import sys
import time
import ripyl.protocol.uart as uart
import ripyl.sigproc as sigp
import ripyl.streaming as stream
import test.test_support as tsup
class TestUARTFuncs(tsup.RandomSeededTestCase):
#@unittest.skip('debug')
def test_uart_decode(self):
self.test_name = 'UART message'
self.trial_count = 10
for i in xrange(self.trial_count):
self.update_progress(i+1)
msg = []
for _ in xrange(20):
msg.append(chr(random.choice(xrange(ord('0'), ord('z')) )))
msg = ''.join(msg)
baud = random.choice((110, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, \
56000, 57600, 115200, 128000, 153600, 230400, 256000, 460800, 921600))
sample_rate = baud * 100.0
rise_time = sigp.min_rise_time(sample_rate) * 10.0 # 10x min rise time
parity = random.choice((None, 'even', 'odd'))
bits = random.choice((7, 8, 9))
#print('\nTRIAL {}: msg="{}", baud={}, parity={}, bits={}'.format(i, msg, baud, parity, bits))
edges = uart.uart_synth(bytearray(msg.encode('utf-8')), bits, baud, parity=parity, idle_start=100.0 / sample_rate)
samples = sigp.synth_wave(edges, sample_rate, rise_time, ripple_db=60)
noisy = sigp.amplify(sigp.noisify(samples, snr_db=20), gain=-15.0)
waveform = list(noisy)
frames = uart.uart_decode(iter(waveform), bits=bits, polarity=uart.UARTConfig.IdleLow, parity=parity, baud_rate=None)
frames = list(frames)
#print(''.join(str(d) for d in frames))
decoded_msg = ''.join(str(d) for d in frames)
self.assertEqual(msg, decoded_msg, \
"Message not decoded successfully msg:'{0}', baud:{1}, parity:{2}, bits:{3}".format(msg, \
baud, parity, bits))
#@unittest.skip('debug')
def test_uart_hello(self):
bits = 8
polarity = uart.UARTConfig.IdleLow
parity = 'even'
stop_bits = 2
message = 'Hello, world!'
samples, sample_period, start_time = tsup.read_bin_file('test/data/uart_hello_8e2.bin')
txd = stream.samples_to_sample_stream(samples, sample_period, start_time)
frames = list(uart.uart_decode(txd, bits=bits, polarity=polarity, parity=parity, stop_bits=stop_bits))
ok_status = True
for f in frames:
if f.nested_status() != stream.StreamStatus.Ok:
ok_status = False
break
self.assertTrue(ok_status, 'Decoded data has non-Ok status')
# Check the message bytes
dmsg = ''.join([chr(d.data) for d in frames])
self.assertEqual(message, dmsg, 'Message mismatch. Expected: "{}" Got: "{}"'.format(message, dmsg))
bits = 8
polarity = uart.UARTConfig.IdleLow
parity = None
stop_bits = 1
message = 'Hello, world!'
samples, sample_period, start_time = tsup.read_bin_file('test/data/uart_hello.bin')
txd = stream.samples_to_sample_stream(samples, sample_period, start_time)
frames = list(uart.uart_decode(txd, bits=bits, polarity=polarity, parity=parity, stop_bits=stop_bits))
ok_status = True
for f in frames:
if f.nested_status() != stream.StreamStatus.Ok:
ok_status = False
break
self.assertTrue(ok_status, 'Decoded data has non-Ok status')
# Check the message bytes
dmsg = ''.join([chr(d.data) for d in frames])
self.assertEqual(message, dmsg, 'Message 2 mismatch. Expected: "{}" Got: "{}"'.format(message, dmsg))
@tsup.timedtest
def test_uart_speed(self):
bits = 8
baud = 9600
polarity = uart.UARTConfig.IdleHigh
parity = None
stop_bits = 1
char_count = 1000
data = [random.randint(0,255) for _ in xrange(char_count)]
edges = list(uart.uart_synth(data, bits, baud, parity=parity, stop_bits=stop_bits))
iterations = 10
self._t_start = time.time()
for _ in xrange(iterations):
records = list(uart.uart_decode(iter(edges), bits=bits, polarity=polarity, parity=parity, stop_bits=stop_bits, \
stream_type=stream.StreamType.Edges, baud_rate=baud))
characters_processed = iterations * char_count
return (iterations, characters_processed, 'characters')